summaryrefslogtreecommitdiff
path: root/macros/latex/contrib/asciilist/asciilist.dtx
blob: 59302b8670d96c10321aa9b34582e926a125972c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
% \iffalse meta-comment
%
% Copyright (C) 2014-2018 by Richard Grewe <r-g+tex@posteo.net>
% -------------------------------------------------------
% 
% This file may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version 1.2
% of this license or (at your option) any later version.
% The latest version of this license is in:
%
%    http://www.latex-project.org/lppl.txt
%
% and version 1.2 or later is part of all distributions of LaTeX 
% version 1999/12/01 or later.
%
% \fi
%
% \iffalse
%<*driver>
\ProvidesFile{asciilist.dtx}
%</driver>
%<package>\NeedsTeXFormat{LaTeX2e}[1999/12/01]
%<package>\ProvidesPackage{asciilist}
%<*package>
    [2018/11/01 v2.2b Package for quickly creating nested lists]
%</package>
%
%<*driver>
\documentclass{ltxdoc}
\usepackage[columns=2]{idxlayout}
\usepackage{xcolor}
\usepackage{showexpl}
\lstset{gobble=2,frame=trbl,backgroundcolor=\color{black!5!white}}
\lstset{explpreset={numbers=none,columns=flexible,basicstyle=\footnotesize\ttfamily}}
\lstset{preset={\small\sffamily},overhang=2cm,pos=r}
\usepackage{asciilist}
\usepackage{paralist}
\usepackage{hypdoc}
\makeatletter
\newcommand\SaveSecs{%
  \@for\SC:=section,subsection,subsubsection\do{%
    \csedef{SC@\SC}{\the\value{\SC}}%
    \setcounter{\SC}{0}}}
\newcommand\RestoreSecs{%
  \@for\SC:=section,subsection,subsubsection\do{%
    \setcounter{\SC}{\csuse{SC@\SC}}}}
\makeatother
\EnableCrossrefs
\CodelineIndex
\RecordChanges
\begin{document}
  \DocInput{asciilist.dtx}
  \PrintChanges
  \PrintIndex
\end{document}
%</driver>
% \fi
%
% \CheckSum{0}
%
% \CharacterTable
%  {Upper-case    \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
%   Lower-case    \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
%   Digits        \0\1\2\3\4\5\6\7\8\9
%   Exclamation   \!     Double quote  \"     Hash (number) \#
%   Dollar        \$     Percent       \%     Ampersand     \&
%   Acute accent  \'     Left paren    \(     Right paren   \)
%   Asterisk      \*     Plus          \+     Comma         \,
%   Minus         \-     Point         \.     Solidus       \/
%   Colon         \:     Semicolon     \;     Less than     \<
%   Equals        \=     Greater than  \>     Question mark \?
%   Commercial at \@     Left bracket  \[     Backslash     \\
%   Right bracket \]     Circumflex    \^     Underscore    \_
%   Grave accent  \`     Left brace    \{     Vertical bar  \|
%   Right brace   \}     Tilde         \~}
%
%
% \changes{v1.0}{2014/09/17}{Initial version}
% \changes{v1.7b}{2015/08/04}{Fixed superfluous whitespaces}
% \changes{v2.2b}{2018/11/01}{Package author's name change}
%
% \GetFileInfo{asciilist.dtx}
%
% \DoNotIndex{\newcommand,\newenvironment,\def,\gdef,\edef}
%
%
% \title{The \textsf{asciilist} package\thanks{This document
%   corresponds to \textsf{asciilist}~\fileversion, dated \filedate.
%   The package is available online at
%   \url{http://www.ctan.org/pkg/asciilist} and
%   \url{https://github.com/Ri-Ga/asciilist}.}}
% \author{Richard Grewe \\ \texttt{r-g+tex@posteo.net}}
%
% \maketitle
%
% \begin{abstract}
% This package provides two environments for \emph{quickly typesetting
% nested lists} in \LaTeX{} without having to type the individual
% |\item| macros or opening/closing nested list environments.
% \end{abstract}
%
% \section{Usage}
%
% We document the functionality of the package by examples in this
% section. The package provides two main environments: |AsciiList| and
% |AsciiDocList|.
%
% The |AsciiList| environment (Section~\ref{sec:AsciiList}) provides a
% list environment in which a single character at the beginning of a
% line can be used to typeset an item at a particular list level. The
% mapping between these characters and list levels is fixed for the
% whole list.
%
% The |AsciiDocList| environment (Section~\ref{sec:AsciiDocList})
% provides a list environment in which a sequence of characters at the
% beginning of a line can be used to typeset an item at a particular
% list level. The mapping between individual characters and list
% environments is fixed for the whole list. This environment, thus, uses
% a syntax that is close to the asciidoc syntax.
%
% \subsection{Lists with Fixed Nesting Layout}\label{sec:AsciiList}
%
% \DescribeEnv{AsciiList}
% Use the |AsciiList|\oarg{environments}\marg{item-chars} environment
% to quickly create \LaTeX{} lists, possibly nested ones, without too
% much \LaTeX{} interference. The following example might illustrate
% the environment best:
%
% \begin{LTXexample}
% \begin{AsciiList}{-,*,+,=}
%  - first item
%    * first sub-item
%    * second sub-item,
%      which is multi-line
%      + a sub-sub item
%        = a sub-sub-sub item
%  - back up by three levels
%    * end at a sub-item
% \end{AsciiList}
% \end{LTXexample}
% Note that in this example, the indentation with spaces is for
% demonstration purposes only. The package itself does not require a
% proper/uniform indentation of the items at the different levels.
% Item levels are solely recognized by the first character of a line.
%
% \DescribeMacro{\AsciiListFromFile}
% Instead of having the list content inline in the \LaTeX{} file, one
% can also choose to put the list into a separate file. A list of
% such file can then be produced via the
% |\AsciiListFromFile|\oarg{environments}\marg{item-chars}\marg{file-name}
% macro. The first two parameters of the macro are the same as the
% parameters of the |AsciiList| environment. The \meta{file-name}
% parameter specifies the name of the file to include.
% \iffalse
%<*ALexample>
 * item
   - sub-item
 * another item
%</ALexample>
% \fi
% \begin{LTXexample}
% \AsciiListFromFile{auto}{AsciiList.example}
% \end{LTXexample}
% In the above example, the used input file has the following content:
% \lstinputlisting{AsciiList.example}
% Using |\input|, you can include the content of a file into an
% |AsciiList| environment. The formatting of the environment is then
% applied also to the content of the included file.
% \begin{LTXexample}
% \begin{AsciiList}{+,*,-}
%   + main item
%     \input{AsciiList.example}
% \end{AsciiList}
% \end{LTXexample}
%
% \DescribeMacro{\AsciiListFromFiles}
% The |\AsciiListFromFiles| macro is the same as |\AsciiListFromFile|,
% except that a comma-separated list is accepted for the
% \meta{file-name} parameter and that the files are input in the listed
% order.
%
% \subsubsection{Choosing List Environments}
%
% If you do not want to use the |itemize| environment for the lists,
% you can change it to |enumerate|, |compactitem| or other list-like
% environments (which should use |\item| for their items) you prefer
% by setting the optional \meta{environments} parameter. For example,
% you can set the \meta{environments} to |itemize,compactitem| in
% order to have the top level list as an |itemize| and the second as
% well as all deeper levels as |compactitem| lists.
%
% The |AsciiList| environment allows you to use more than just list
% environments like |itemize|, |enumerate|, or |description|. You can
% even use sectioning command names (|chapter|, |section|, |section*|,
% |subsection|, |paragraph| etc.), which have been enabled already
% with the |\NewAsciiListEnv| macro. If you use such ``environments'',
% every list entry will be produced using the respective |\chapter|,
% |\section|, |\section*|, |\subsection|, |\paragraph|, etc.{} macro.
% Note, however, that only the first line of such an item will then be
% used for the name of the section/subsection/etc.
% \SaveSecs
% \begin{LTXexample}
% \begin{AsciiList}[section,subsection]{-,*}
%  - first section
%    * a subsection
%  - second section
% \end{AsciiList}
% \end{LTXexample}
%
% If you do not want to manually specify the nesting levels, you can
% also use the list environment |Heading|\oarg{initial}, as the
% following example demonstrates.\medskip
% \begin{LTXexample}
% \begin{AsciiList}[Heading<subsection>]{-,*,+}
%  - a sub-section
%    * a sub-sub-section
%      + a paragraph
%        and some text
% \end{AsciiList}
% \end{LTXexample}
% \RestoreSecs
% The |Heading| list environment produces numbered sections.
% Correspondingly, |Heading*| produces unnumbered sections.
%
% List environments with optional parameters are also supported,
% including their parameters. For instance, the |compactenum|
% environment of the \textsf{paralist} package has an optional parameter
% configuring the appearance of the individual items. The following
% example shows how to specify the optional parameters:\medskip
% \begin{LTXexample}
% \begin{AsciiList}[compactenum<1.>,
%                   compactenum<(a)>]{auto}
%  - item number 1.
%    * item (a)
%    * item (b)
%  - item number 2.
% \end{AsciiList}
% \end{LTXexample}
% Care has to be taken when the optional argument contains a comma. In
% this case, the optional argument must be enclosed in parentheses such
% that \LaTeX{} does not confuse the comma with a comma that separates
% the list environments.
%
% \subsubsection{Automatic Item Detection}
%
% If you want to be more flexible regarding the characters for the
% list items, you can use |auto| as the parameter to the environment.
% The |AsciiList| then makes an attempt to automatically identify the
% list items from a predefined list (preset to ``-'', ``*'', ``+'').
% \DescribeMacro{\AsciiListSetAutochars}
% You can change this list using the
% |\AsciiListSetAutochars|\marg{chars} macro, which expects
% \meta{chars} to be a comma-separated list of chars. The ordering of
% this list does not matter. What matters is the ordering in which the
% characters appear in the environment.
% \begin{LTXexample}
% \AsciiListSetAutochars{+,*,-,=}
% \begin{AsciiList}[enumerate,itemize,
%                   compactitem]{auto}
%  - first item
%    * first sub-item
%    * second sub-item,
%      which is multi-line
%      + a sub-sub item
%  - back up by three levels
%    * end at a sub-item
% \end{AsciiList}
% \end{LTXexample}
%
% \subsubsection{Navigating Upwards}
% \changes{v2.1}{2016/03/05}{Documentation of \cs{UP} and \cs{UPTO}}
%
% If you want to typeset a list in which a list item is continued after
% sub-items of that item, you can use the |\UP| and |\UPTO| macros.
% \DescribeMacro{\UP}
% The |\UP|\oarg{N} macro goes back \meta{N} levels (default: 1) without
% starting a new item at the resulting level.
% \DescribeMacro{\UPTO}
% The |\UPTO|\marg{N} macro goes back to level \meta{N} (where the
% topmost level is 0) without starting a new item at the resulting
% level.
% The following example illustrates the use of the two macros.
% \begin{LTXexample}
% \begin{AsciiList}{auto}
%  - first item
%    * sub-item
%    \UP[1]
%    continuation one level higher
%    * another sub-item
%      + a sub-sub-item
%    \UPTO{1}
%    continuation on first-item level
% \end{AsciiList}
% \end{LTXexample}
%
%
% \subsection{Lists with AsciiDoc-Like Notation}\label{sec:AsciiDocList}
%
% \DescribeEnv{AsciiDocList}
% Use the |AsciiDocList|\oarg{environments} environment to quickly create
% \LaTeX{} lists, possibly nested ones, without too much \LaTeX{}
% interference. The following example might illustrate the environment
% best:
% \begin{LTXexample}
% \begin{AsciiDocList}
%  * first item (itemized)
%    *+ first sub-item (enumerated)
%    *+ second sub-item (enumerated),
%       which is multi-line
%       *+* a sub-sub item
%  * back up by three levels
%    ** end at a sub-item (itemized)
% \end{AsciiDocList}
% \end{LTXexample}
% Note that in this example, the indentation with spaces is for
% demonstration purposes only. The package itself does not require a
% proper/uniform indentation of the items at the different levels.
%
% By default, the |*| character maps to an |itemize| item, the |+|
% character maps to an |enumerate| item, and the |;| character maps to a
% description item (where the item label follows in the line after the
% |;| and the item text follows in the subsequent line).
%
% \DescribeMacro{\AsciiDocListFromFile}
% Instead of having the list content inline in the \LaTeX{} file, one
% can also choose to put the list into a separate file. A list of
% such file can then be produced via the
% |\AsciiDocListFromFile|\oarg{environments}\marg{file-name}
% macro. The optional parameter of the macro is the same as the
% parameter of the |AsciiDocList| environment. The \meta{file-name}
% parameter specifies the name of the file to include.
% \iffalse
%<*ADLexample>
 * item
   *+ sub-item
 * another item
%</ADLexample>
% \fi
% \begin{LTXexample}
% \AsciiDocListFromFile{AsciiDocList.example}
% \end{LTXexample}
% In the above example, the used input file has the following content:
% \lstinputlisting{AsciiDocList.example}
% Using |\input|, you can include the content of a file into an
% |AsciiDocList| environment. The formatting of the environment is then
% applied also to the content of the included file.
% \begin{LTXexample}
% \begin{AsciiDocList}
%   * first item
%   \input{AsciiDocList.example}
% \end{AsciiDocList}
% \end{LTXexample}
%
% \DescribeMacro{\AsciiDocListFromFiles}
% The |\AsciiDocListFromFiles| macro is the same as
% |\AsciiDocListFromFile|, except that a comma-separated list is
% accepted for the \meta{file-name} parameter and that the files are
% input in the listed order.
%
% \subsubsection{Choosing List Environments}
%
% If you do not want to use the pre-defined mapping of |*| to |itemize|
% etc., you can change the mapping to other list-like environments
% (which should use |\item| for their items) you prefer by setting the
% optional \meta{environments} parameter. For example, you can set the
% \meta{environments} to |*=itemize,-=compactitem,!=enumerate|.
%
% The |AsciiDocList| environment allows you to use more than just list
% environments like |itemize|, |enumerate|, or |description|. The range
% of supported environments is for |AsciiDocList| is the same as for
% |AsciiList|.
% \SaveSecs
% \begin{LTXexample}
% \begin{AsciiDocList}[/=section,
%                      *=subsection]
%  / first section
%    /* first subsection
%    /* second subsection
%  / second section
% \end{AsciiDocList}
% \end{LTXexample}
% \RestoreSecs
%
% \subsubsection{Navigating Upwards}
% \changes{v2.1}{2016/03/05}{Documentation of \cs{UPTO}}
%
% If you want to typeset a list in which a list item is continued after
% sub-items of that item, you can use the |\UPTO| macro.
% \DescribeMacro{\UPTO}
% The |\UPTO|\marg{chars} macro goes back the level identified by
% \meta{chars} without starting a new item at the resulting level.
% The following example illustrates the use of the macro.
% \begin{LTXexample}
% \begin{AsciiDocList}
%  ; description
%    beginning of description
%    ;+ item
%      ;+* sub-item
%    \UPTO{;}
%    continuation of description
% \end{AsciiDocList}
% \end{LTXexample}
%
%
% \section{Customizing List Environments}\label{sec:config}
%
% \DescribeMacro{\AsciiListRegisterEnv}
% You can register additional environment names for use with
% |AsciiList| or |AsciiDocList| by using the
% |\AsciiListRegisterEnv|\marg{envname}\marg{begin}\marg{end}\marg{item}
% macro, by which the \meta{begin}, \meta{end}, and \meta{item} code
% can be specified.
% \DescribeMacro{\AsciiListEndArg}
% If you want to use a command for the \meta{item}
% code that takes a single parameter (e.g., |\section|), then you can
% use |\AsciiListEndArg|\marg{command} for the \meta{item} to pass the
% whole line of the item to \meta{command}.
% \DescribeMacro{\AsciiListEndOArg}
% If the \meta{item} takes a single \emph{optional} parameter (like
% |\item|), then use |\AsciiListEndOArg|\marg{command} instead of
% |\AsciiListEndArg|.
% For example to register an environment |TTEnum| for enumerating
% items in typewriter font, you can use the following command:
% \begin{LTXexample}
% \AsciiListRegisterEnv{TTEnum}
%      {\enumerate}{\endenumerate}
%      {\AsciiListEndArg{\item\texttt}}
% \begin{AsciiList}[TTEnum]{-}
%  - items are typewriter
%    (though only in the first line)
%  - and enumerated
% \end{AsciiList}
% \end{LTXexample}
%
% \subsection{Customizing \texttt{AsciiList}}
%
% \DescribeMacro{\AsciiListSetEnvironments}
% You can also change the default list environments for |AsciiList| from
% |itemize| to a comma-separated list of \meta{environments}. This
% allows you to omit the optional parameter to the |AsciiList|
% environment for such default configurations. For this, use the
% |\AsciiListSetEnvironments|\marg{environments} macro.
% \begin{LTXexample}
% \AsciiListSetEnvironments{enumerate,
%                           compactitem<!>}
% \begin{AsciiList}{-,*}
%  - first
%    * sub
%  - second
% \end{AsciiList}
% \end{LTXexample}
%
% \DescribeMacro{\NewAsciiListEnv}
% If particular kinds of nested lists occur several times in your
% document, you can also define abbreviation environments, as
% demonstrated in the following (which also shows how to use
% |description| environments in an |AsciiList|):
% \begin{LTXexample}
% \NewAsciiListEnv[description,compactitem]
%                 {auto}{TopicIdeas}
% \begin{TopicIdeas}
%  + food:
%    - cheese
%    - nuts
%  + beverages:
%    - water
%    - milk
% \end{TopicIdeas}
% \end{LTXexample}
%
% \subsection{Customizing \texttt{AsciiDocList}}
%
% \DescribeMacro{\AsciiDocListSetEnvironments}
% You can also change the default list environments for |AsciiDocList|
% from |*=itemize,+=enumerate| to another comma-separated list of
% \meta{environments}. This allows you to omit the optional parameter to
% the |AsciiDocList| environment for such default configurations. For this,
% use the |\AsciiDocListSetEnvironments|\marg{environments} macro.
% \begin{LTXexample}
% \AsciiDocListSetEnvironments{?=enumerate,
%                              !=compactitem<!>}
% \begin{AsciiDocList}
%  ? item?
%    ?! sub!
%  ? second
% \end{AsciiDocList}
% \end{LTXexample}
%
% \DescribeMacro{\NewAsciiDocListEnv}
% The analogous macro to |\NewAsciiListEnv| for the |AsciiDocList|
% environment is |\NewAsciiDocListEnv|. Its use is as the following
% example illustrates:
% \begin{LTXexample}
% \NewAsciiDocListEnv[!=Description,
%                     *=compactitem]{TopicDoc}
% \begin{TopicDoc}
%  ! food:
%    !* cheese
%    !* nuts
%  ! beverages:
%    !* water
%    !* milk
% \end{TopicDoc}
% \end{LTXexample}
%
% \section{Noteworthy Features}
%
% \begin{itemize}
% \item This package can be used together with Sync\TeX{}. That is,
%   for a point in the |AsciiList| of a generated PDF, one can obtain
%   the position in the |AsciiList|'s source code.
% \item Some initial tests show that |AsciiList| can be used in a
%   |p|-column of a |tabular| environment.
% \end{itemize}
%
% \section{Known Limitations}
%
% \begin{itemize}
% \item Currently, the |AsciiList| and |AsciiDocList| environments
%   cannot be used in a ``moving argument'', such as in a |\footnote|.
%   If you really want such lists in footnotes, you might consider
%   using |\AsciiListFromFile| and friends.
% \item Not all chars can directly be used as item chars. This probably
%   is some character code issue that so far has not been investigated
%   further.
% \end{itemize}
%
% \section{Related Packages}
%
% The following \LaTeX{} packages provide similar functionalities to
% the \textsf{asciilist} package.
%
% \begin{description}
% \item[\textsf{easylist}:]
%   This package is probably closest to \textsf{asciilist}. The package
%   ``is designed for typesetting lists of numbered items [...] with a
%   single active character acting as the only command'' (cited from
%   the package documentation). The package provides a lot of
%   possibilities for configuring the appearance of items at the
%   individual levels.
%   Compared to \textsf{asciilist}, the package differs in two main
%   points. Firstly, the package uses a single character for the items.
%   This character can be used in the middle of a line to begin a new
%   item and, hence, must not occur in the text itself. The character
%   must be repeated for indicating the depth of the item, rather than
%   having separate characters for different levels. Secondly, the
%   package is focused on list environments and does not support using
%   sectioning macros for items at selected levels.
%   Finally, the package does not provide convenience functionality
%   similar to that described in Section~\ref{sec:config} of this
%   documentation.
% \item[\textsf{iitem}:]
%   This package provides macros |\iitem|..|\ivtem|, which can be used
%   within |enumerate| and |itemize| environments for changing list
%   levels without explicitly starting nested |enumerate| and |itemize|
%   environments. The list type (|enumerate|, |itemize|, \ldots) is
%   the same for all nested list levels.
%   Compared to \textsf{asciilist}, the package has the main drawback
%   that the list type is the same for all levels. Moreover, the package
%   uses \LaTeX-ish enumeration macros rather than nice symbols. The
%   package does not provide convenience functionality similar to that
%   described in Section~\ref{sec:config} of this documentation.
%   Finally, the package has the limitation that items below the first
%   level must be placed within a single line.
% \item[\textsf{outlines}:]
%   This package provides an |outline| environment, in which multiple
%   list levels can be accessed. The individual levels can be reached
%   via |\1|..|\4| macros, which substitute the |\item| of the
%   respective level. The list environments that |outline| uses
%   for the individual levels are configurable.
%   Compared to \textsf{asciilist}, the package has the slight drawback
%   that it uses \LaTeX-ish enumeration macros rather than nice symbols.
%   Moreover, the package does not offer convenience functionality
%   similar to that described in Section~\ref{sec:config} of this
%   documentation.
% \end{description}
%
% \clearpage
%
% \StopEventually{}
%\iffalse
%<*package>
%\fi
%
% \section{Implementation}
%
% The \textsf{etoolbox} package is used for processing comma-separated
% lists easily.
%    \begin{macrocode}
\RequirePackage{etoolbox}
%    \end{macrocode}
% The \textsf{trimspaces} package is used for trimming leading spaces
% in a robust manner.
%    \begin{macrocode}
\RequirePackage{trimspaces}
%    \end{macrocode}
%
% \subsection{The \texttt{AsciiList} Environment}
%
% \begin{environment}{AsciiList}
% The |AsciiList|\oarg{environments}\marg{item-chars} creates an
% environment in which nested lists can be typeset without much
% \LaTeX{} interference. The \meta{item-chars} must specify of
% comma-separated list of characters. The special value |auto| makes
% the environment try to auto-detect the \meta{item-chars}.
% The \meta{environments} specifies an optional, comma-separated list
% of environments to be used to create the lists at the individual
% levels.
% \changes{v1.2}{2014/09/18}{Allow auto-detection of item-chars}
% \changes{v2.1b}{2016/03/31}{Eliminated expansion of optional argument}
%    \begin{macrocode}
\newenvironment{AsciiList}[2][]{%
  \bgroup
%    \end{macrocode}
% Setup the environment by storing the list \meta{environments} to use
% and -- most importantly -- setting up the newline character such
% that it scans for the \meta{item-chars} to find new list items.
%    \begin{macrocode}
  \ifstrempty{#1}%
    {\let\asclst@listenv=\asclst@defaultenvs}%
    {\def\asclst@listenv{#1}}%
%    \end{macrocode}
% Convert the given \meta{item-chars} to an internal list of
% \textsf{etoolbox}, because this makes working with the list easier.
%    \begin{macrocode}
  \gdef\asclst@itemchars{}%
  \ifstrequal{#2}{auto}%
    {\asclst@autocharstrue}%
    {\asclst@autocharsfalse\forcsvlist{\listadd\asclst@itemchars}{#2}}%
  \asclst@nlsetup\asclst@newline
%    \end{macrocode}
% We re-define |\input|\marg{filename} such that it becomes possible
% to include |AsciiList|-formatted input files.
%    \begin{macrocode}
  \def\input##1{%
%    \end{macrocode}
% We input the file using the |\@@input| primitive, because this
% primitive can be expanded via |\expandafter| such that the
% |\asclst@newline| can parse the first line of the file already.
%    \begin{macrocode}
    \everyeof{\noexpand}%
    \expandafter\asclst@newline\@@input##1\relax}%
%    \end{macrocode}
% Initialize to nesting level $0$. And make the macro |\UP| available
% for switching to an upper level.
% \changes{v1.5}{2014/09/21}{Avoid missing item error in empty
%                            environment}
% \changes{v1.5}{2014/09/21}{Add command to explicitly changle levels
%                            upwards}
%    \begin{macrocode}
  \global\asclst@curlevel=0\relax%
  \let\UP=\asclst@levelsup%
  \let\UPTO=\asclst@levelsupto%
%    \end{macrocode}
% Ensure that the scanning for an item char starts with the very first
% line of the environment.
% \changes{v2.0a}{2016/02/23}{Improved first-line handling.}
%    \begin{macrocode}
  \asclst@ifnextnewline{}{\asclst@newline}%
}{%
%    \end{macrocode}
% Ensure that all remaining open list environments are closed before
% the end of the |AsciiList| environment.
%    \begin{macrocode}
  \asclst@changelistlevel{\asclst@curlevel}{0}%
  \asclst@restorenewline%
  \egroup}
%    \end{macrocode}
% \end{environment}
%
% \begin{macro}{\AsciiListFromFile}
% The |\AsciiListFromFile|\oarg{environments}\marg{item-chars}\marg{file-name}
% macro produces a result like the |AsciiList| environment does,
% but takes the content of the list from \meta{file-name}.
% \changes{v1.8}{2015/08/19}{Added this macro}
%    \begin{macrocode}
\newcommand\AsciiListFromFile[3][]{%
  \AsciiList[#1]{#2}%
  \input{#3}%
  \endAsciiList}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\AsciiListFromFiles}
% The |\AsciiListFromFiles|\oarg{environments}\marg{item-chars}\marg{file-list}
% macro produces a result like the |AsciiList| environment does,
% but takes the content of the list from the comma-separated
% \meta{file-list}.
% \changes{v1.8b}{2015/08/24}{Added this macro}
%    \begin{macrocode}
\newcommand\AsciiListFromFiles[3][]{%
  \AsciiList[#1]{#2}%
%    \end{macrocode}
% We do the same here as for the |\AsciiListFromFile| macro,
% just in a loop over the \meta{file-list}. Note that |\dolistloop|
% is to be avoided here, because there is quite some chance that
% the |\do| macro gets redefined in the included code.
%    \begin{macrocode}
  \forcsvlist{\input}{#3}%
  \endAsciiList}
%    \end{macrocode}
% \end{macro}
%
% \subsubsection{Handling of Line Breaks}
%
% For our code, line breaks are important to be tracked, because an
% item-indicating char at the beginning of a line (i.e., after a line
% break) is crucial.
%    \begin{macrocode}
{\catcode`\^^M=\active%
%    \end{macrocode}
%
% \begin{macro}{\asclst@checknext}
% The |\asclst@checknext|\marg{first-char}\marg{item-char} checks
% whether \meta{first-char} (used with the first char of a line after
% a line break) is equal to a given \meta{item-char} (a character that
% indicates the beginning of a new list item) and, if so, sets the
% counter |\asclst@newlevel| to the value of |\@tempcntb|. This is used
% in |\asclst@newline| to store the index of a found \meta{item-char} in
% the list of \meta{item-chars} of the |AsciiList| environment.
%    \begin{macrocode}
  \gdef\asclst@checknext#1#2{%
    \ifstrequal{#1}{#2}{\asclst@newlevel=\@tempcntb}{}}%
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\asclst@newline}
% The |\asclst@newline|\marg{first-char} macro is executed whenever a
% newline character occurs in the |AsciiList| environment. The
% \meta{first-char} then is the first character (or, rather, token)
% after the newline.
% Important in this macro: all lines must end with a percent char, to
% not introduce new newline chars in the macro itself (this would
% yield an endless recursion).
%    \begin{macrocode}
  \gdef\asclst@newline#1{%
%    \end{macrocode}
% First, we find out whether the next char is in list
% \meta{item-chars} (i.e., in |\asclst@itemchars|) and return the
% position in the list in
% |\asclst@newlevel| (or $0$ if not found).
%    \begin{macrocode}
    \asclst@newlevel=0\@tempcntb=0\relax%
    \forlistloop{\advance\@tempcntb by 1\asclst@checknext{#1}}%
                {\asclst@itemchars}%
%    \end{macrocode}
% If the next char is not in the \meta{item-chars}, but the
% |AsciiList| was given the |auto| parameter for \meta{item-chars},
% then we check whether we can automatically determine the character
% for a new nesting level. The char for this new nesting level is then
% (globally) added to the list of known \meta{item-chars} in
% |\asclst@itemchars|. Note that in the following code, the value
% of |\@tempcntb| still is the length of the |\asclst@itemchars| list.
%    \begin{macrocode}
    \ifnum\asclst@newlevel=0\ifasclst@autochars%
      \ifinlist{#1}{\asclst@autocharlist}{%
        \listgadd\asclst@itemchars{#1}%
        \asclst@newlevel=\@tempcntb%
        \advance\asclst@newlevel by 1\relax%
      }{}%
    \fi\fi%
%    \end{macrocode}
% If we found a character from \meta{item-chars}, then we ensure to
% change to the nesting level of this character (which is in
% |\asclst@newlevel|) and then trigger a new |\item|.
% \changes{v1.5b}{2014/09/24}{Fix item spacing for in-paragraph lists}
% \changes{v1.8b}{2015/08/24}{Robustified by not using \cs{do}}
%    \begin{macrocode}
    \ifnum\asclst@newlevel>0\relax%
      \def\asclst@@do{%
        \asclst@changelistlevel{\asclst@curlevel}{\asclst@newlevel}%
        \ifhmode\unskip\space\fi\asclst@@item}%
    \else%
%    \end{macrocode}
% If no character from \meta{item-chars} is found, we check whether
% the newline causing |\asclst@newline| to be invoked is followed by
% another newline character. In this case, we insert a |\par|.
% \changes{v1.5b}{2014/09/24}{Empty lines captured}
%    \begin{macrocode}
      \def\asclst@@tmpone{#1}\def\asclst@@test{^^M}%
      \ifx\asclst@@test\asclst@@tmpone%
        \def\asclst@@do{\par #1}%
%    \end{macrocode}
% Otherwise, we just use a |\space| for the newline character and
% flush out the token |#1| that we captured after the newline
% character.
%    \begin{macrocode}
      \else\def\asclst@@do{\space #1}\fi%
    \fi\asclst@@do}%
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\asclst@ifnextnewline}
% The |\asclst@ifnextnewline|\marg{iftrue}\marg{iffalse} macro checks
% whether the next character is a newline. If the check succeeds, then
% the macro expands to \meta{iftrue}. Otherwise, the macro expands to
% \meta{iffalse}.
%    \begin{macrocode}
  \gdef\asclst@ifnextnewline{\@ifnextchar^^M}
%    \end{macrocode}
% \end{macro}
%
% The following ends the group with active line break catcode.
%    \begin{macrocode}
}
%    \end{macrocode}
%
% \subsubsection{Level-Changing Macros}
%
% \begin{macro}{\asclst@curlevel}
% We use the |\asclst@curlevel| counter to capture the current nesting
% depth of list environments within an |AsciiList|. We also use a
% counter for changing the level to a new one.
%    \begin{macrocode}
\newcount\asclst@curlevel
\newcount\asclst@newlevel
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\asclst@changelistlevel}
% The |\asclst@changelistlevel|\marg{from}\marg{to} changes the list
% nesting level from level \meta{from} (a number) to level \meta{to}
% (a number), by issuing the right number of |\begin| or |\end|
% environments.
% \changes{v1.1}{2014/09/18}{Allow list of list environments}
%    \begin{macrocode}
\newcommand\asclst@changelistlevel[2]{%
  \def\asclst@@envchanger{}%
  \ifnum#2<#1\relax
%    \end{macrocode}
% If $\meta{to}<\meta{from}$, then we must change to a lower list nesting
% level. We do this by inserting $\meta{from}-\meta{to}$
% |\end|-environments, which we store in |\asclst@@envchanger|.
%    \begin{macrocode}
    \def\asclst@@last{}%
%    \end{macrocode}
% First, we collect all affected environment names from the given
% \meta{environments} parameter to |AsciiList| (which at this point is
% in |\asclst@listenv|): We take all those from list index $\meta{to}+1$
% until list index $\meta{from}$, in reverse order (hence |\preto|),
% which are actually in the list.
%    \begin{macrocode}
    \@tempcnta=0\relax
    \@tempcntb=#2 \advance\@tempcntb by 1\relax
    \def\do##1{\advance\@tempcnta by1\relax
      \ifnum\@tempcnta<\@tempcntb\else
        \ifnum\@tempcnta>#1\else
        \preto\asclst@@envchanger{\asclst@end ##1<>\@undefined}\fi\fi
      \def\asclst@@last{##1}}%
    \expandafter\docsvlist\expandafter{\asclst@listenv}%
%    \end{macrocode}
% Second, for all indices from $\meta{to}+1$ until $\meta{from}$ that
% are \emph{not} in the \meta{environments} list, we just take the
% last list entry (stored in |\asclst@@last| by the above code) and
% repeat it sufficiently often, i.e., from
% $\max(\mathrm{len}\meta{environments},\meta{from})+1$ until
% $\meta{to}$ times.
%    \begin{macrocode}
    \advance\@tempcnta by1\ifnum\@tempcnta<\@tempcntb
      \@tempcnta=\@tempcntb\fi
    \loop \ifnum\@tempcnta>#1\else
      \advance\@tempcnta by 1%
      \epreto\asclst@@envchanger{\noexpand
        \asclst@end\expandonce\asclst@@last<>\noexpand\@undefined}%
    \repeat%
  \else\ifnum#2>#1\relax%
%    \end{macrocode}
% The following does the same as the above, except that:
% |\begin| instead of |\end| of environments are collected;
% they are collected in the ordering as in \meta{environments} (hence
% |\appto|); and
% entries are collected from $\meta{from}+1$ to $\meta{to}$.
%    \begin{macrocode}
    \def\asclst@@last{}%
    \@tempcnta=0\relax
    \@tempcntb=#1\relax\advance\@tempcntb by 1\relax
    \def\do##1{\advance\@tempcnta by1\relax
      \ifnum\@tempcnta<\@tempcntb\else
        \ifnum\@tempcnta>#2\else
        \appto\asclst@@envchanger{\asclst@begin ##1<>\@undefined}\fi\fi
      \def\asclst@@last{##1}}%
    \expandafter\docsvlist\expandafter{\asclst@listenv}%
    \advance\@tempcnta by1\ifnum\@tempcnta<\@tempcntb
      \@tempcnta=\@tempcntb\fi
    \loop \ifnum\@tempcnta>#2\else
      \advance\@tempcnta by 1%
      \eappto\asclst@@envchanger{%
        \noexpand\asclst@begin
          \expandonce\asclst@@last<>\noexpand\@undefined}%
    \repeat%
  \fi\fi%
%    \end{macrocode}
% Update the current level to the new value, \meta{to}. Then write out
% the begin/end environments collected in |\asclst@@envchanger|.
%    \begin{macrocode}
  \global\asclst@curlevel=#2%
  \asclst@@envchanger}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\asclst@levelsup}
% The |\asclst@levelsup|\oarg{number} macro allows switching to a
% nesting level that is \meta{number} levels upwards (default:
% $\meta{number}=1$). In the |AsciiList| environment, this macro is
% accessible via the |\UP| command.
%    \begin{macrocode}
\newcommand*\asclst@levelsup[1][1]{%
  \asclst@newlevel=\asclst@curlevel
  \advance\asclst@newlevel by-#1\relax
  \asclst@changelistlevel{\asclst@curlevel}{\asclst@newlevel}}
%    \end{macrocode}
% \end{macro}
% \begin{macro}{\asclst@levelsupto}
% The |\asclst@levelsupto|\marg{number} macro allows switching to
% list nesting level \meta{number}. In the |AsciiList| environment,
% this macro is accessible via the |\UPTO| command.
%    \begin{macrocode}
\newcommand*\asclst@levelsupto[1]{%
  \ifnum\asclst@curlevel<#1\relax
    \PackageError{asciilist}{Cannot change level downwards!}{}%
  \else
    \asclst@changelistlevel{\asclst@curlevel}{#1}%
  \fi}
%    \end{macrocode}
% \end{macro}
%
%
%
% \subsection{The \texttt{AsciiDocList} Environment}
%
% \begin{environment}{AsciiDocList}
% The |AsciiDocList|\oarg{environments} creates an environment in which
% nested lists can be typeset without much \LaTeX{} interference. The
% \meta{environments} must be a comma-separated list of
% ``\meta{char}=\meta{environment}'' entries.
% \changes{v2.0}{2015/11/13}{Added \texttt{AsciiDocList} environment}
%    \begin{macrocode}
\newenvironment{AsciiDocList}[1][]{%
  \bgroup
%    \end{macrocode}
% Modify the newline character to scan for characters that trigger
% items.
% \changes{v2.2}{2016/04/15}{Enabled \cs{input} in the macros and environments}
%    \begin{macrocode}
  \def\asclst@curnestlvl{}%
  \asclst@nlsetup\asclst@docnewline%
%    \end{macrocode}
% We re-define |\input|\marg{filename} such that it becomes possible
% to include |AsciiDocList|-formatted input files.
%    \begin{macrocode}
  \def\input##1{%
%    \end{macrocode}
% We input the file using the |\@@input| primitive, because this
% primitive can be expanded via |\expandafter| such that the
% |\asclst@docnewline| can parse the first line of the file already.
%    \begin{macrocode}
    \expandafter\asclst@docnewline\@@input##1\relax}%
%    \end{macrocode}
% Now setup the characters that trigger items.
%    \begin{macrocode}
  \def\asclst@levelchrs{}%
  \def\do##1{\asclst@parsechmapentry##1\@undefined}%
  \ifstrempty{#1}%
    {\expandafter\docsvlist\expandafter{\asclst@docdefaultenvs}}%
    {\docsvlist{#1}}%
%    \end{macrocode}
% And make the macro |\UPTO| available for switching to an upper level.
% \changes{v2.1}{2016/03/04}{Add \cs{UPTO} to explicitly changle levels
%                            upwards}
%    \begin{macrocode}
  \let\UPTO=\asclst@changedoclistlevel%
%    \end{macrocode}
% Ensure that the scanning for an item char starts with the very first
% line of the environment.
% \changes{v2.0a}{2016/02/23}{Improved first-line handling.}
%    \begin{macrocode}
  \asclst@ifnextnewline{}{\asclst@docnewline}%
}{%
%    \end{macrocode}
% Ensure that all remaining open list environments are closed before the
% end of the |AsciiDocList| environment.
%    \begin{macrocode}
  \asclst@changedoclistlevel{}%
  \asclst@restorenewline%
  \egroup}
%    \end{macrocode}
% \end{environment}
%
% \begin{macro}{\AsciiDocListFromFile}
% The |\AsciiDocListFromFile|\oarg{environments}\marg{file-name}
% macro produces a result like the |AsciiDocList| environment does,
% but takes the content of the list from \meta{file-name}.
%    \begin{macrocode}
\newcommand\AsciiDocListFromFile[2][]{%
  \AsciiDocList[#1]%
  \input{#2}%
  \endAsciiDocList}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\AsciiDocListFromFiles}
% The |\AsciiDocListFromFiles|\oarg{environments}\marg{file-list}
% macro produces a result like the |AsciiDocList| environment does,
% but takes the content of the list from the comma-separated
% \meta{file-list}.
%    \begin{macrocode}
\newcommand\AsciiDocListFromFiles[2][]{%
  \AsciiDocList[#1]%
%    \end{macrocode}
% We do the same here as for the |\AsciiDocListFromFile| macro,
% just in a loop over the \meta{file-list}. Note that |\dolistloop|
% is to be avoided here, because there is quite some chance that
% the |\do| macro gets redefined in the included code.
%    \begin{macrocode}
  \forcsvlist{\input}{#2}%
  \endAsciiDocList}
%    \end{macrocode}
% \end{macro}
%
%
% \subsubsection{Handling of Line Breaks}
%
% For our code, line breaks are important to be tracked, because an
% item-indicating char at the beginning of a line (i.e., after a line
% break) is crucial.
%    \begin{macrocode}
{\catcode`\^^M=\active%
%    \end{macrocode}
%
% \begin{macro}{\asclst@docnewline}
% The |\asclst@docnewline|\marg{first-char} macro is executed whenever a
% newline character occurs in the |AsciiDocList| environment. The
% \meta{first-char} then is the first character (or, rather, token)
% after the newline.
% \changes{v2.2}{2016/04/15}{Robustified file inputs against \cs{everyeof} changes}
%    \begin{macrocode}
  \gdef\asclst@docnewline{%
%    \end{macrocode}
% The following is a bit of a hack to ensure that there is some
% parameter to |\asclst@docnewline| even if the input file ends with
% a newline directly afterwards.
%    \begin{macrocode}
    \everyeof{\noexpand}%
    \asclst@docnewline@i{}}%
%    \end{macrocode}
% \end{macro}
% \begin{macro}{\asclst@docnewline@i}
% The |\asclst@docnewline@i|\marg{char-seq}\marg{test-char} macro
% recursively collects characters (tokens) until a token is found that
% is not in |\asclst@levelchrs|.
%    \begin{macrocode}
  \gdef\asclst@docnewline@i#1#2{%
    \ifinlist{#2}{\asclst@levelchrs}%
      {\asclst@docnewline@i{#1#2}}%
      {\asclst@docnewline@ii{#1}{#2}}}%
%    \end{macrocode}
% \end{macro}
% \begin{macro}{\asclst@docnewline@ii}
% The |\asclst@docnewline@ii|\marg{char-seq}\marg{next} macro creates a
% new list item (in the right environment), if \meta{char-seq} is
% non-empty. The \meta{next} character must not be in the
% |\asclst@levelchrs| and is inserted after the new item.
%    \begin{macrocode}
  \gdef\asclst@docnewline@ii#1#2{%
    \ifstrempty{#1}{%
%    \end{macrocode}
% If \meta{char-seq} is empty, this means there was no item char at the
% beginning of the line. Hence, no item shall be put here, but the
% \meta{next} char must be inserted again. If \meta{next} is another
% newline character, then we insert a |\par| instead.
%    \begin{macrocode}
      \def\asclst@@tmpone{#2}\def\asclst@@test{^^M}%
      \ifx\asclst@@test\asclst@@tmpone%
        \def\asclst@@do{\par #2}%
      \else%
        \def\asclst@@do{\space #2}\fi%
      \asclst@@do%
    }{%
%    \end{macrocode}
% If \meta{char-seq} is non-empty, then change the nesting level
% to \meta{char-seq} and then trigger a new |\item|.
%    \begin{macrocode}
      \asclst@changedoclistlevel{#1}%
      \ifhmode\unskip\space\fi\asclst@@item #2%
    }}%
%    \end{macrocode}
% \end{macro}
% The following ends the group with active line break catcode.
%    \begin{macrocode}
}
%    \end{macrocode}
%
% \begin{macro}{\asclst@parsechmapentry}
% The |\asclst@parsechmap|\meta{char}|=|\meta{env}|\@undefined| macro
% adds a \meta{char} to the list of level characters and defines a
% mapper macro from the \meta{char} to the \meta{env}.
%    \begin{macrocode}
\def\asclst@parsechmapentry#1=#2\@undefined{%
  \listadd\asclst@levelchrs{#1}%
  \csdef{asclst@levelchr@#1}{#2}}
%    \end{macrocode}
% \end{macro}
%
% \subsubsection{Level-Changing Macros}
%
% \begin{macro}{\asclst@changedoclistlevel}
% The |\asclst@changedoclistlevel|\marg{to} changes the list nesting level
% from level |\asclst@curnestlvl| (a character sequence) to level
% \meta{to} (a character sequence), by issuing the right number of
% |\begin| or |\end| environments.
%    \begin{macrocode}
\newcommand\asclst@changedoclistlevel[1]{%
  \def\asclst@@envchanger{}%
  \expandafter\asclst@changedoclistlevel@i\asclst@curnestlvl{}{}\@undefined
    #1{}{}\@undefined
  \asclst@@envchanger
  \gdef\asclst@curnestlvl{#1}}
%    \end{macrocode}
% \end{macro}
% \begin{macro}{\asclst@changedoclistlevel@i}
% The
% |\asclst@changedoclistlevel@i|\meta{ohd}\meta{otl}|\@undefined|\meta{nhd}\meta{ntl}|\@undefined|
% macro recursively strips off the common prefixes from the old
% environment list (with head \meta{ohd} and tail \meta{otl}) and the
% new environment list (with head \meta{nhd} and tail \meta{ntl}).
% Afterwards, the macro uses |\asclst@changedoclistlevel@ii| to construct
% the |\asclst@@envchanger|.
%    \begin{macrocode}
\def\asclst@changedoclistlevel@i#1#2\@undefined#3#4\@undefined{%
%    \end{macrocode}
% If both environment lists have been processed, then \meta{ohd} and
% \meta{nhd} are empty and nothing needs to be done.
%    \begin{macrocode}
  \ifstrempty{#1#3}{}{%
%    \end{macrocode}
% Otherwise, if the heads are equal, go to the recursive case for
% further stripping off the common prefix. If the
% heads differ, proceed with |\asclst@changedoclistlevel@ii|.
%    \begin{macrocode}
    \ifstrequal{#1}{#3}%
      {\asclst@changedoclistlevel@i#2{}\@undefined#4{}\@undefined}%
      {\asclst@changedoclistlevel@ii#1#2{}\@undefined#3#4{}\@undefined}%
    }}
%    \end{macrocode}
% \end{macro}
% \begin{macro}{\asclst@changedoclistlevel@ii}
% The
% |\asclst@changedoclistlevel@ii|\meta{ohd}\meta{otl}|\@undefined|\meta{nhd}\meta{ntl}|\@undefined|
% macro recursively decomposes the old environment list (with head
% \meta{ohd} and tail \meta{otl}) and the new environment list (with
% head \meta{nhd} and tail \meta{ntl}). In the process, the macro
% constructs the |\asclst@@envchanger| macro by prepending a closing
% environment for \meta{ohd} and appending an opening environment for
% \meta{nhd}. After the construction, the change of environment is
% performed by expanding |\asclst@@envchanger|.
%    \begin{macrocode}
\def\asclst@changedoclistlevel@ii#1#2\@undefined#3#4\@undefined{%
%    \end{macrocode}
% If both environment lists have been processed, then \meta{ohd} and
% \meta{nhd} are empty and nothing needs to be done further.
%    \begin{macrocode}
  \ifstrempty{#1#3}{}{%
%    \end{macrocode}
% Otherwise, first process \meta{ohd} by prepending a closing
% environment.
%    \begin{macrocode}
    \ifstrempty{#1}{}{%
      \epreto\asclst@@envchanger{%
        \noexpand\asclst@end 
          \csuse{asclst@levelchr@#1}<>\noexpand\@undefined}}%
%    \end{macrocode}
% Second, process \meta{nhd} by appending an opening environment.
%    \begin{macrocode}
    \ifstrempty{#3}{}{%
      \eappto\asclst@@envchanger{%
        \noexpand\asclst@begin
          \csuse{asclst@levelchr@#3}<>\noexpand\@undefined}}% 
%    \end{macrocode}
% Third, recurse with the remainders of the lists.
%    \begin{macrocode}
    \asclst@changedoclistlevel@ii#2{}\@undefined#4{}\@undefined}}
%    \end{macrocode}
% \end{macro}
%
%
%
% \subsection{Shared Code between \texttt{AsciiList} and \texttt{AsciiDocList}}
%
% \begin{macro}{\asclst@begin}
% \begin{macro}{\asclst@end}
% The macro
%   |\asclst@begin|\marg{env}|<|\meta{opt}|>|\meta{ignored}|\@undefined|
% corresponds to \LaTeX's |\begin|\oarg{opt}
% and
%   |\asclst@end|\marg{env}|<|\meta{ignored}|>|\meta{ignored}|\@undefined|
% corresponds to \LaTeX's |\end|.
% If \meta{env} was
% not registered by |\AsciiListRegisterEnv|, then the macros are even
% identical to |\begin| and |\end|. Otherwise, the macros expand to
% the \meta{begin} and \meta{end} code registered for \meta{env}. In
% addition, |\asclst@begin| sets up the |\asclst@@item| macro that is used
% to create a list item.
% \changes{v1.7}{2015/06/03}{Optional parameters for list environments}
%    \begin{macrocode}
\long\def\asclst@begin#1<#2>#3\@undefined{%
  \ifinlist{#1}{\asclst@registeredenvs}%
    {\bgroup
     \ifstrempty{#2}%
       {\@nameuse{asclst@env@#1@begin}}%
       {\@nameuse{asclst@env@#1@begin}[#2]}%
     \edef\asclst@@item{\csexpandonce{asclst@env@#1@item}}}%
    {%
     \ifstrempty{#2}%
       {\begin{#1}}%
       {\begin{#1}[#2]}%
     \def\asclst@@item{\item}}}
\long\def\asclst@end#1<#2>#3\@undefined{%
  \ifinlist{#1}{\asclst@registeredenvs}%
    {\@nameuse{asclst@env@#1@end}\egroup}%
    {\end{#1}}}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% For our code, line breaks are important to be tracked, because an
% item-indicating char at the beginning of a line (i.e., after a line
% break) is crucial.
%    \begin{macrocode}
{\catcode`\^^M=\active%
%    \end{macrocode}
%
% \begin{macro}{\asclst@nlsetup}
% The |\asclst@nlsetup|\marg{nl-macro} macro sets up the newline
% character such that it runs the \meta{nl-macro} upon every newline.
%    \begin{macrocode}
  \gdef\asclst@nlsetup#1{%
%    \end{macrocode}
% Save the current newline, make it active, and set the newline
% to expand to our \meta{nl-macro} macro, which does the main job of
% this whole package at every newline.
%    \begin{macrocode}
    \let\asclst@orignewline=^^M%
    \catcode`\^^M\active%
    \let^^M=#1}%
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\asclst@restorenewline}
% The |\asclst@restorenewline| restores the meaning of the newline
% character that is changed by |\asclst@nlsetup|.
%    \begin{macrocode}
  \gdef\asclst@restorenewline{\let^^M=\asclst@orignewline}%
%    \end{macrocode}
% \end{macro}
% The following ends the group with active line break catcode.
%    \begin{macrocode}
}
%    \end{macrocode}
%
%
% \subsection{Configuration}
%
% \begin{macro}{\AsciiListSetAutochars}
% \begin{macro}{\ifasclst@autochars}
% \begin{macro}{\asclst@autocharlist}
% The |\asclst@autochars| conditional is used to store whether the
% \meta{item-chars} are to be auto-detected. In this case, the
% \meta{item-chars} are attempted to be derived from the candidates in
% |\asclst@autocharlist|. The |\AsciiListSetAutochars|\marg{chars}
% allows one to specify a user-defined list of characters for the
% auto-detection.
%    \begin{macrocode}
\newif\ifasclst@autochars
\newcommand*\AsciiListSetAutochars[1]{%
  \def\asclst@autocharlist{}%
  \forcsvlist{\listadd\asclst@autocharlist}{#1}}
\AsciiListSetAutochars{-,*,+}
%    \end{macrocode}
% \end{macro}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\AsciiListSetEnvironments}
% \begin{macro}{\asclst@defaultenvs}
% The |\AsciiListSetEnvironments|\marg{environments} macro sets the
% default list environment. This default is used when the optional
% \meta{environments} argument is not given to |AsciiList|.
% \changes{v1.3}{2014/09/18}{Allow setting default list environment}
%    \begin{macrocode}
\newcommand*\AsciiListSetEnvironments[1]{%
  \def\asclst@defaultenvs{#1}}
\AsciiListSetEnvironments{itemize}
%    \end{macrocode}
% \end{macro}
% \end{macro}
% \begin{macro}{\AsciiDocListSetEnvironments}
% \begin{macro}{\asclst@docdefaultenvs}
% The |AsciiDocListSetEnvironments|\marg{environments} macro sets the
% default \meta{environments} argument for the |AsciiDocList|
% environment.
%    \begin{macrocode}
\newcommand*\AsciiDocListSetEnvironments[1]{%
  \def\asclst@docdefaultenvs{#1}}
\AsciiDocListSetEnvironments{*=itemize,+=enumerate,;=Description}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\NewAsciiListEnv}
% The
% |\NewAsciiListEnv|\oarg{environments}\marg{item-chars}\marg{envname}
% macro creates a new environment named \meta{envname}. The use of
% this environment then is equivalent to using
% |AsciiList[|\meta{environments}|]{|\meta{item-chars}|}|.
% Moreover, the macro creates a new macro
% \cs{\meta{envname}FromFile}\marg{file-name}, which is equivalent to
% |\AsciiListFromFile[|\meta{environments}|]{|\meta{item-chars}|}{|\meta{file-name}|}|.
% Analogously, the macro \cs{\meta{envname}FromFiles} is defined.
% \changes{v1.3}{2014/09/18}{Allow creating list environments that use
%                            given parameters}
% \changes{v1.8b}{2015/08/24}{Registered list environments can now be
%                             loaded from files}
%    \begin{macrocode}
\newcommand*\NewAsciiListEnv[3][]{%
  \newenvironment{#3}%
    {\begin{AsciiList}[#1]{#2}}%
    {\end{AsciiList}}%
  \csdef{#3FromFile}##1{\AsciiListFromFile[#1]{#2}{##1}}%
  \csdef{#3FromFiles}##1{\AsciiListFromFiles[#1]{#2}{##1}}%
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\NewAsciiDocListEnv}
% The
% |\NewAsciiDocListEnv|\oarg{environments}\marg{envname}
% macro creates a new environment named \meta{envname}. The use of
% this environment then is equivalent to using
% |AsciiDocList[|\meta{environments}|]|.
% Moreover, the macro creates a new macro
% \cs{\meta{envname}FromFile}\marg{file-name}, which is defined
% to be equivalent to
% |\AsciiDocListFromFile[|\meta{environments}|]{|\meta{file-name}|}|.
% Analogously, the macro \cs{\meta{envname}FromFiles} is defined.
%    \begin{macrocode}
\newcommand*\NewAsciiDocListEnv[2][\asclst@docdefaultenvs]{%
  \newenvironment{#2}%
    {\begin{AsciiDocList}[#1]}%
    {\end{AsciiDocList}}%
  \csdef{#2FromFile}##1{\AsciiDocListFromFile[#1]{##1}}%
  \csdef{#2FromFiles}##1{\AsciiDocListFromFiles[#1]{##1}}%
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\AsciiListRegisterEnv}
% \begin{macro}{\asclst@registeredenv}
% The
% |\AsciiListRegisterEnv|\marg{envname}\marg{begin}\marg{end}\marg{item}
% macro registers a new environment name for use with |AsciiList| and
% |AsciiDocList|.
% After such a registration, one may use the \meta{envname} as an
% element in the \meta{environments} parameter to |AsciiList| or
% |AsciiDocList|. The \meta{begin}, \meta{end}, and \meta{item} code is
% used whenever such a newly defined environment is begun or ended, or a
% list entry is started, respectively. Note that by using the
% |\AsciiListRegisterEnv|, no real \LaTeX{} environment is created.  All
% registered environments are collected in the |\asclst@registeredenvs|
% list.
% \changes{v1.4}{2014/09/19}{Allow registering additional
%                            environments}
%    \begin{macrocode}
\def\asclst@registeredenvs{}
\newcommand*\AsciiListRegisterEnv[4]{%
  \listadd\asclst@registeredenvs{#1}%
  \csdef{asclst@env@#1@begin}{#2}%
  \csdef{asclst@env@#1@end}{#3}%
  \csdef{asclst@env@#1@item}{#4}}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\AsciiListRegisterDescEnv}
% The |\AsciiListRegisterDescEnv|\marg{envname} is a macro that can be
% used as a shorthand for |\AsciiListRegisterEnv| to declare existing
% description environments. The environment \meta{envname} must exist
% and must be a description environment, i.e., one whose entries are
% specified via |\item|\oarg{text}.
%    \begin{macrocode}
\newcommand*\AsciiListRegisterDescEnv[1]{%
  \AsciiListRegisterEnv{#1}{\csuse{#1}}{\csuse{end#1}}%
                       {\AsciiListEndOArg{\item}}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\AsciiListEndArg}
% The |\AsciiListEndArg|\marg{command} macro is equal to the given
% \meta{command}, except that the first argument passed to
% \meta{command} is the remainder of the line in which the macro is
% used.
%    \begin{macrocode}
{\catcode`\^^M=\active%
  \gdef\AsciiListEndArg#1#2^^M{%
%    \end{macrocode}
% Note the line break at the end of the following line. This line
% break is important, because the definition of |\AsciiListEndArg|
% swallows one line break. By having the line break below, we
% essentially re-insert the line break, such that |AsciiList| or
% |AsciiDocList| can use it again to check for list items in the
% subsequent line.
% \changes{v1.5b}{2014/09/24}{Ignore initial spaces in argument}
% \changes{v1.6}{2014/10/12}{Robustified ignoring initial spaces}
% \changes{v1.6b}{2014/10/14}{Robustified ignoring initial spaces}
% \changes{v1.6c}{2014/10/16}{Robustified ignoring initial spaces}
% \changes{v2.1b}{2016/03/31}{Robustified ignoring initial spaces}
%    \begin{macrocode}
    \begingroup%
    \def\asclst@@result{#2}\trim@pre@space@in{\asclst@@result}%
    \edef\asclst@@result{%
      \endgroup\unexpanded{#1}{\expandonce{\asclst@@result}}}%
    \asclst@@result
  }%
%    \end{macrocode}
% \end{macro}
% \begin{macro}{\AsciiListEndOArg}
% The |\AsciiListEndOArg|\marg{command} macro constitutes the
% counterpart to the |\AsciiListEndArg| macro for the case of a
% \meta{command} that takes an \emph{optional} argument (like the
% |\item| of a |description| environment).
% \changes{v1.5b}{2014/09/24}{Ignore initial spaces in argument}
% \changes{v1.6}{2014/10/12}{Robustified ignoring initial spaces}
% \changes{v1.6b}{2014/10/14}{Robustified ignoring initial spaces}
% \changes{v1.6c}{2014/10/16}{Robustified ignoring initial spaces}
% \changes{v2.1b}{2016/03/31}{Robustified against nested square brackets}
%    \begin{macrocode}
  \gdef\AsciiListEndOArg#1#2^^M{%
    \begingroup%
    \def\asclst@@result{#2}\trim@pre@space@in{\asclst@@result}%
    \edef\asclst@@result{%
      \endgroup\unexpanded{#1}[{\expandonce{\asclst@@result}}]}%
    \asclst@@result
  }%
}
%    \end{macrocode}
% \end{macro}
%
% \subsection{Pre-Defined List Environments}
%
% In the following, we define some environment names that allow one to
% use sectioning commands for list items. When using these
% environments, one should be aware that list entries in these
% environments must fit into a single line (i.e., everything after a
% line break is not put into the argument of the sectioning command).
%    \begin{macrocode}
\AsciiListRegisterEnv{chapter}{}{}{\AsciiListEndArg{\chapter}}
\AsciiListRegisterEnv{section}{}{}{\AsciiListEndArg{\section}}
\AsciiListRegisterEnv{subsection}{}{}{\AsciiListEndArg{\subsection}}
\AsciiListRegisterEnv{subsubsection}{}{}%
                     {\AsciiListEndArg{\subsubsection}}
\AsciiListRegisterEnv{section*}{}{}{\AsciiListEndArg{\section*}}
\AsciiListRegisterEnv{subsection*}{}{}{\AsciiListEndArg{\subsection*}}
\AsciiListRegisterEnv{subsubsection*}{}{}%
                     {\AsciiListEndArg{\subsubsection*}}
\AsciiListRegisterEnv{paragraph}{}{}{\AsciiListEndArg{\paragraph}}
%    \end{macrocode}
% For nesting sections with sub-sections etc., the |Heading| and
% |Heading*| environments can be used.
% \changes{v2.2}{2016/04/14}{Added ``Heading'' environment}
%    \begin{macrocode}
\AsciiListRegisterEnv{Heading}{\asclst@Heading}{\endasclst@Heading}%
                     {\AsciiListEndArg{\csuse{\asclst@@sec}}}
\AsciiListRegisterEnv{Heading*}{\asclst@Heading}{\endasclst@Heading}%
                     {\AsciiListEndArg{\csuse{\asclst@@sec}*}}
%    \end{macrocode}
% \begin{environment}{asclst@Heading}
% The |asclst@Heading|\oarg{initial} environment is an auxiliary
% environment for the |Heading| list environment usable in |AsciiList|
% and |AsciiDocList|. Inside the environment, one can use
% |\csuse{\asclst@@sec}|\marg{title} to produce a heading at a
% particular level. The initial level is provided by the optional
% \meta{initial} argument. When the |asclst@Heading| environment is
% nested, the heading level decreases (for instance, going from
% ``section'' to ``subsection'').
%    \begin{macrocode}
\newenvironment{asclst@Heading}[1][section]%
  {\bgroup\ifdefmacro{\asclst@@sec}%
%    \end{macrocode}
% If |\asclst@@sec| is already defined, use the |\asclst@Sec@...| macros
% to determine the next sub-level (next line). Otherwise, initialize the
% |\asclst@@sec| macro using the \meta{initial} argument.
%    \begin{macrocode}
    {\edef\asclst@@sec{\csuse{asclst@Sec@\asclst@@sec}}}%
    {\def\asclst@@sec{#1}}}%
  {\egroup}
\newcommand\asclst@Sec@part{chapter}
\newcommand\asclst@Sec@chapter{section}
\newcommand\asclst@Sec@section{subsection}
\newcommand\asclst@Sec@subsection{subsubsection}
\newcommand\asclst@Sec@subsubsection{paragraph}
\newcommand\asclst@Sec@paragraph{subparagraph}
%    \end{macrocode}
% \end{environment}
% To simplify the use of the |description| environment as well as
% other common description environments (the packages defining these
% environments need not be loaded until the environments are actually
% used).
%    \begin{macrocode}
\AsciiListRegisterDescEnv{description}
\AsciiListRegisterDescEnv{compactdesc}
%    \end{macrocode}
% It often looks less appealing to have the first item of an |itemize|
% or |enumerate| environment in the same line as the parent item in a
% description environment. As an alternative to this default behavior
% of \LaTeX{}, we offer the following |Description| and |CompactDesc|
% environments, with which the child items start in a new line (but
% if the environment starts with text, then this will still be placed
% in the same line as the description item).
% \changes{v1.5b}{2014/09/24}{Added alternative description
%                             environments}
%    \begin{macrocode}
\AsciiListRegisterEnv{Description}{\description}{\enddescription}%
                     {\AsciiListEndOArg{\asclst@BreakingDescItem}}
\AsciiListRegisterEnv{CompactDesc}{\compactdesc}{\endcompactdesc}%
                     {\AsciiListEndOArg{\asclst@BreakingDescItem}}
%    \end{macrocode}
% \begin{macro}{\asclst@BreakingDescItem}
% The |\asclst@BreakingDescItem|\oarg{item} macro is the same as
% |\item[|\meta{item}|]| except that it is additionally ensured that
% the first item of a contained list environment is not displayed on
% the same line.
% \changes{v2.1b}{2016/03/31}{Robustified against nested square brackets}
%    \begin{macrocode}
\newcommand\asclst@BreakingDescItem[1][]{\item[{#1}]\leavevmode}
%    \end{macrocode}
% \end{macro}
%\iffalse
%</package>
%\fi
% \Finale
\endinput